21314001144 has 64 divisors (see below), whose sum is σ = 55079331840. Its totient is φ = 6866052480.

The previous prime is 21314001131. The next prime is 21314001173. The reversal of 21314001144 is 44110041312.

It is a self number, because there is not a number n which added to its sum of digits gives 21314001144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 533514 + ... + 572070.

It is an arithmetic number, because the mean of its divisors is an integer number (860614560).

Almost surely, 2^21314001144 is an apocalyptic number.

21314001144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21314001144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27539665920).

21314001144 is an abundant number, since it is smaller than the sum of its proper divisors (33765330696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21314001144 is a wasteful number, since it uses less digits than its factorization.

21314001144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39340 (or 39336 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21314001144 its reverse (44110041312), we get a palindrome (65424042456).

The spelling of 21314001144 in words is "twenty-one billion, three hundred fourteen million, one thousand, one hundred forty-four".